The Register, a British tech news website, reports that some models of Airbus's A350 airliners, the company's 'workhorse' model, still need to be rebooted after exactly 149 hours of continuous use, even after the EU's aviation authority ordered Airbus to fix the glitch ASAP.

Now, the EU is issuing a reminder to pilots to make sure to turn their planes on and off again after 149 hours of power-on time, or risk the loss of critical systems in-flight.

Airbus' rival Boeing very publicly suffered from a similar time-related problem with its 787 Dreamliner: back in 2015 a memory overflow bug was discovered that caused the 787's generators to shut themselves down after 248 days of continual power-on operation. A software counter in the generators' firmware, it was found, would overflow after that precise length of time.